Photographic developing apparatus.



No. 887,055. PATEHTED MAY 12, 1908. F. W. BARNES & M. B. PUNNETT. PHOTOGRAPHIG DEVELOPING APPARATUS.

APPLICATION IILED OCT-6, 1907.

2/08 in use:

sRED'ERIcK-w, BARNESAIND PATENT OFFICE.

mm BI PUNNELT'IJQ-OF nocniasrniz, NEW Yosx assrenons T EASTMAN 50ml; coir-PAM; OF ROCHESTER, NEW'YORK; A CORPORATION OVFNEW YORK No. 887,065. El Muti ation mroroeasrrne- Dnvnnorme-arrmmrus:

flatten-salient. retained-n 12, 1'eos i "Appneatlen m Ootobsr '6, 1o9 1.-

at. seven.

To all whom p I IBe it known 1'. at 1W6, FREDERICK BARNES an'dMrpron B. PUNNETT, of RO'GhQSfl -ter, inthe county of Monroe and-State of New York; have invented" certain new "and -,Im rovementsin "Photographic D'e veloping paratus nd vWe 'dOj hereby .de

clare the 0 owin" tobe a full,- cl l andexact, description 0 the same; referencebeingfl I0,

had to the accompanying drawings, formmg f Y a part 1 of he specification,- and tothe reference-numeralsniarked thereon.

Our present invention relates to'tlie ratus used .in the" develgpment of'ph0to-- fluidt ht:

our imirovements. v atien t en on the line 2 -2 of Fig. 1.

: I .8 ried on, it is also the urpose of "the inventi'on' to eliminate in suc device the 001160,

. goingtreatment. I

graphic negatives and ithas for object to provideaneflicient and inexpensive device-of the-type nerally referredt'oas tank'devel opera wit which a plurality of photos a hic Iplates magi-be safely and convene 1 n y placed-and-t e developing proeesscartion ofaair .bells .upon the plates'whil under- Our improvements are further directed to ward-the: means for rendering the cntainer Tot ese andother ends the invention (3on certain improvements and combina- .tions' of-parts all as .I. will be hereinafter more fully described; 'the novel features beingpointed out in the. end of the I --In the dramn gs ifiFigure l-is a central ve r tical section of a develo ing tank embodying Figflis'a vertical seei 3. is a perspective view of'the'plate rack. 'fii -.,f 4 shows a portion of the top of the receptae e" in side elevation with one of the clamping devices forfthe cover in position'for enlgla ement, and F 1g. 5 1s a 'similar vlew w1t t e by. immersionin the c sulting in a amusements and cause unequally emical action totake place, re-

distriliuted' I 'fiearance of spots uponthe .when ed. For the purpose of.

economy, it is-desirable to use but a small amount of: solution for eae'h'operation, renderingthe Q 'tation thereof with the plates smestdiflicifii movement of the plates, under ordinary conditiongmfienders the danger of fi f g 01' breaking t objectionsand at the same time simplify the eneralprocess, we provide arack having perorTated-endsadapted-to support on edge and depth t an the cones ondmg two directions insuch manner that the .o n-

'in'g's thro h which the contents have en insertedm .be closed by a wall of the'recept and tedious w limits-lily;

rout of contact a plurality of-plates and a" flnid ti ht reeeptacle' therefon'of 'greatern Y dimen ion o he eek, withinwhich the latter'fits togidein em. To overcome all of the e tacle. 1 The latter is filled'with solution to a' depth-suificient to item "the plates and by.

I reversing it at intervalsend for end, the red isgalso inverted, the liquid flowing-freely which it "is traveling, Further, as the usual rectangularzproportions of .a plate make" it convement to form both the rack and reoep throughout its length by reason "of theflperfqrate'd ends and also forming a bufler to pre vent thefefiect of a too severe impact of the rack against the wall of thereceptacle toward I 1 tacle'ofsimilar sliape,we rovide means -mno way interfering with the. oregoing mampulations, for effect ng a fluid tighten 'agement of the'cover by a rectilinear rather t an a rotary movement relatively to the receptacle.

similar numerals'of reference indicate similar arts, and particularly to-Fig.-3 thereof the evice illus trate'd;as an embodiment of my invention comprises apreferably rectangular Referringy'now to the -drawings wherein.

frame-1'. eonstitutin a laterack, the to (is 0? p back'and bottom si veniently formed from a single-strip of mate rial .as, sheet met'ahthe said sides-having whichgm'ay'be 'con-' flangedredges2 overlapped at their intersections and tied by a; i-SOlderj-Or' other; 1

-wise secured to ether;- lhe? ends-of said strip are refera ly 'conneeted;bya band 3 secured t eretov as -bytlie tonguee 4' and forming an open. side to the frame, atjwhat' ma be termed the-front face 1 of .therackr sti ening ribs"5-being-provided onsaid band p T1 Upon the inner faces of the top} and hotand uponth'e rear. wal

I torn wallswe arrange a series of oppositelydis- P e ridges 6 rest ewesby corrugated plates 7 attached by means of the tongues 8 and between these rid es a plurality of plates 9 are accommodate and fastened by a direct movement rather than which it is preferably secured, and rim, is arthrough the opening at the to it will be prevented from undue latera movement though permitted to slide longitudinally, and the. plates will be held a ainst advance: ment through the open face y a wall of the container A fluid tight cover 12 is provided for the receptacle and because of its special requirements, it is constructed and operated in a particular manner. In the first place, it is preferable to. manufacture the rece tacle' om-light sheet materialwith the resu t that its edge or rim being thin, offers but a small bearing surface a ainst the cover and must, therefore, be tig t1 7 engaged and further,

the said ed e shoul be continuous with the "walls order to render free and convenient the insertion and renioval ofthe rack. As

before mentioned the sha e of the plates and of the rack just describe make it desirable 'to have a 1prismatic, as distinguished from a cylindrica tank, so that the cover must be through rotation. We, therefore, construct it as illustrated, preferably from a sheet metal plate having a continuous depending flange 13 telescopically engaging upon the exterior of the rim 14 of the receptacle. An expanded portion at the base of the flange orms a recess 15 extending laterally beyond the engaging face of the latter and that of the rim and also constituting a de ression in the inner face of the plate. Wi in this recess and depression and between the cover to ranged a gasket 16 of yielding material such as rubber. i

. Formed on 0" posite sides of the receptacle near, the top. are bosses 17, reinforced by plates 18, and in contact with which are pivoted 'ec'c'entrically, bosses 19 on sheet metal -"operating arms 20, the said bosses 19 being punched clear of the body of the arm eiccept where connected to the supporting stra s 21. Rotatably mounted on these bosses are ooks '22 which engage projections 23 on the'cover and are provided with abutments 24 and 25 engaged by s urs 26 on the arms to limit'the movement 0 the latter relatively thereto.

grates for a purpose that will be hereinafter,

slides to the o the former are in the'released position, shown.

in Fig. 4, rotation of thelatter will also move the bites of' the hooks to points above the {projections on the cover so that when the -arms are de ressed, as shown in Fig. 5, the eccentrics 1 lower the hooks vertically into engagement, while reverse motion of the arms will return them. 3 This forms a very powerful clamp, yet it will be noticed that the rim of the receptacle is forced against the asket 16 approximately at the center of the atter, by reason of the osition of the recess within which it lies an a true and uniform engagement is effected. This would not be the case were the'recess not rovided and the gasket simply secured in t e corner of the cover as the rim would unevenly eng I near its edge and either force it out of p ace or wear it back to a degree-that would destroy itsusefulnessfl D In operation, the plates, are inserted in the rack, as before explained, and the latter lowered into the receptacle intowhich a quantity of solution, sufficient to submer c it by displacement, has been reviously pl cover is then applied and fastened and after standing a few minutes, .and also at intervals during the time the plates are being treated, the tank is inverted, whereupon the rack posite .end and in so doing is not only slowe in its. movement by the liquid which travels ahead of it, but displaces the latter in a manner causing it to fiow through the openings 10 andbetween the plates in perfect circulation, removing what air bells aced. The

may have collectedand replacing the dead liquid adjacent the sensitized surfaces. The tank is as completely sealed against leakage .Livhen-resting upon its cover as upon its base, while the depression 15 forms a raised ortion on the exterior of the cover upon w 'ch the tank will stand evenly and firmly, even though-the material thereof buckle slightly in use. A loop 24 is preferably Epovided .u'pon the top of t e rack through w from the solution. I v

The use of such a device as we have de:

ch a suitable mstrum'ent'may be. passed removing it scribed is both convenient and cleanly, as the hands need never come in contact with the discolored solutions and in this connection it will be noted that by virtue 'of'the articular position of the gasket, the flanges o the ,cover' agitated as to effectually'prevent the forma-' tion of bubbles thereon while resenting its maximum strength to the sensitizedcoating.

We claim as our invention:

, 1. In a photographic developing apparatus, the combination with a receptacle having a fluid'tight cover, of a removable plate rack contained within the receptacle and conforming substantially in width and thickness to the interior configuration of the latter, the interior of; said rack being accessible for the insertion of plates only from a face adj acent a side wall of the receptacle.

2. In a photographic developing apparatus, the combination with a receptacle having a fluid tight cover, of a removable plate rack slidable Within the rece tacle and conforming substantially in width and thickness to the interior configuration of the latter, the interior of said rack being accessible for the insertion of plates only from a'face adjacent a side wall of the rece tacle.

In a photographic developing apparatus, the combination with a receptacle having a fluid tight cover, of'a removable plate rack slidable within the rece tacle and conforming substantially in widt iand thickness to the interior configuration of the latter, said rack being provided with openings on its top and bottom faces and the interior thereof being accessible for the insertion of plates only from a face adjacent a side wail of the receptacle. I,

4. In a photographic developing tank, the combination with. a receptacle open at one end and adapted to contain a removable plate rack,'of a cover for said receptacle havmg a flange arranged to telescopically engage the rim of the latter adjacent the opening and provided with an expanded portion at the base of the flange forming a recess eX- .ending laterally of the engaging face thereof, a gasket composed of yielding material arranged in the recess and betwei-ui. the cover .end and and rim and means for clamping the cover to the rim.

5. In a photographic developing tank, the combination with a receptacle open at one adapted to contain a removable plate rack, of a removable cover for said receptacle having a continuous flange thereon arranged to telescopically engage the rim of the receptacle adjacent t 1e opening and provided with an expandedportion at the base ofthe flange forming a continuous recess extending'laterally of the engaging face thereof,

a gasket composed of a yielding material arranged 1n the recess between the cover and rim and means for clamping the cover to the rim.

6. In a photograpl'iic developing tank, the combination with a receptacle openat one end and adapted to contain a removable plate rack, of a cover for said receptacle comprising a plate having ranged to telescopically engage the rim of the latter adjacent the opening and provided ortion at the base of the with an expanded flange forming boti a recess extending laterally of the engaging face thereof and a deression in the inner face of the plate, a gasket composed of yielding material arranged withinthe recess and depression and between the cover and the rim of the rece tacle and means for clamping the cover to t e rim.

FREDERICK WY. BARNES.

MILTON B. PUNNETT.

Witnesses E. (J. MEYER, J. T. ONEILL.

a flange thereon are 

